I am not to sure if this is the correct forum for this type of question.
When I tested the code in The App Academy for "Create a Video Thumbnail Index" I found that the rendering does not work properly.
Currently using LiveCode version 7.0.2-rc-1
kindly see attached image.

Hi Klaus
My apologies. it is supposed to do the following when the user clicks a button:
1. Play and move through a video
2. Create thumbnails from a video
3. Use a field to display a clickable picture index
The stack has the following objects:
A button
A scrolling field
A player

The button script to create the index of the video of which the property in the player for the example is already set.
The Button Code:

on mouseUp
repeat the number of images
delete image 1
end repeat
repeat with i = 0 to 21
put i * "10000" into theNumber
set the currentTime of player 1 to theNumber
import snapshot from player 1
set the name of last image to "frame" && theNumber
hide last image
end repeat
put empty into field 1
repeat with i = 1 to the number of images
put "x" into char 1 of line i of fld 1
set the imageSource of char 1 of line i of fld 1 to the id of image i
end repeat
end mouseUp